Pocket Watch Database
Patent Archive
#322375
Patent Information
Electric Incandescent Sign
Isaac W. Heysinger
July 14, 1885
Patent #322375
| Patent Number: | 322375 |
| Description: | Electric Incandescent Sign |
| Inventor(s): | Isaac W. Heysinger |
| Patent Date: | Jul 14, 1885 |
| Registration Type: | Patent |
| External Research: | https://www.google.c… |
| Patent Document: |
